X Minus One premiered in April 1955 on NBC and ran until January 1958. Like its predecessor series, Dimension X, X Minus One featured stories by the greatest names in modern science fiction: Ray Bradbury, Isaac Asimov, Robert Heinlein, Clifford Simak, Robert Bloch, and many more.
"[X Minus One] brought current SF to radio, providing adaptations of many excellent new stories and thus allowing the public to appreciate the best science fiction available at the time." (Michael Ashley, The Time Machines: The Story of the Science-Fiction Pulp Magazines)
I'd never listened to any of the X-1 broadcasts before, but I bought a bunch of them to listen to while travelling on holiday: only 45p each, what a bargain. You have to be ready for vintage Americana. It's all very 1950's: a bit clonky, with plenty of shouty men who are supposed to be sharp high-achievers but who seem remarkably slow on the uptake. Thankfully there's a whiff of humour. It's fun to listen to but the main thing letting it down is that the whole series (except for one episode) only seems to have one plot-line. Not a problem if you only want to listen to one or two of them.